Network Security Engineer - Military veterans preferred

ManTech (


  full-time   employee

United States

Secure our Nation, Ignite your Future

Become an integral part of a diverse team while working at an Industry Leading Organization, where our employees come first.  At ManTech International Corporation, you’ll help protect our national security while working on innovative projects that offer opportunities for advancement.

Currently, ManTech is seeking a motivated, career and customer-oriented Network Security Engineer at our Kingstowne VA office.

Responsibilities include, but are not limited to:

  • Transport-layer engineers to validate a customized, metered approach to modernize and enhance functionalities such as IPv6, SIP, and H.323, as well as other industry best practices.
  • Possess the knowledge and technical understanding to maintain and improve existing protocols such as QoS, Metro-Ethernet, and SONET technologies for CONUS and OCONUS locations.
  • Experience with initiatives such as the Dynamic Multipoint VPN (DMVPN), Layer 2 Multiprotocol Label Switching (MPLS), cloud hosted Equinix sites. 
  • Work with vendors such as Cisco, Riverbed, Infoblox, and Fortine. Support high availability LAN/WAN planning. Automate advanced routing capabilities, WAN path control remediation solutions, and customized price-to-performance cost-savings data.
  • Investigate the USCIS WAN and develop new solutions, specifically taking advantage of new technologies that embrace software defined networks, to include policy-based routing.
  • Design and Architect a new Private IP WAN solution. 
  • Design and engineer IPv6 implementation and support strategy. Strategy shall include migration of all devices, sites, and applications.
  • Provide recommendations for new products and technology for supporting all layers of the IT infrastructure architecture.
  • Support the following technologies with expert knowledge: BGP, iWAN, DMVPN, EIGRP, MPLS, VRF, QoS, PBR, VSS, HSRP, STP, Cisco Meraki stack, WAN Optimization technologies, and Cisco Nexus.
  • Apply Industry-standard network design principals and best practices.
  • Establish an efficient and effective repeatable methodology for architecture and engineering solutions from concept to delivery of operations.
  • Develop and implement SIP functionality with secure/encrypted transport.
  • Support SIP, H.323 standard protocols with expert knowledge.
  • Responsible for architecting, engineering, and maintaining cloud direct connects and third-party interconnects where needed.

Basic Qualifications:

  • Bachelor's degree in Computer Science, or related field preferred. 3-5 years of experience.
  • Experience designing, engineering and designing solutions with a security mindset
  • Ability and desire to work in a fast-paced, rapidly changing, collaborative environment.
  • Strong troubleshooting and analytical skills required.
  • Must have strong critical thinking, complex problem solving, appropriate judgment, and decision-making skills
  • Experience with major cloud providers mandatory.
  • Possess superior technical aptitude and effective written and verbal communications skills.
  • Proven experience with managing and using Dev Ops concepts.
  • Capable of supporting tools such as, or similar to:

NetCollector Steel Central ARX Steel Central Controller AlgoSec Amazon Cisco ACI/SDN Platform Cisco Cloud Center Cisco Firepower Cisco Identity Services Engine Cisco Meraki Cisco Nexus Platform Cisco Routing platforms Cisco Security Manager Cisco Switching platform Google Infoblox IWAN Meraki Cloud Portal and devices MS Azure NetProfiler QOS Quality of Service Riverbed SD-WAN Riverbed Steelhead family suite Solarwinds Stealthwatch Steel Central Mobile Controller VipTella VMWare  NSX

Preferred Qualifications:

  • One or more relevant industry certifications
  • Familiar with tools including: ServiceNow, GitHub
  • Experience with ITIL, DevSecOps and Agile concepts
  • Experience supporting Government contracts

Security Clearance Requirements:

  • U.S. Citizen with the ability to obtain Public Trust and complete DHS Security Clearance
  • Ability to obtain DHS EOD suitability
  • Current DHS EOD highly preferred

Physical Requirements:

  • Office work, typically sedentary with some movement around the office.

For all positions requiring access to technology/software source code that is subject to export control laws, employment with the company is contingent on either verifying U.S.-person status or obtaining any necessary license. The applicant will be required to answer certain questions for export control purposes, and that information will be reviewed by compliance personnel to ensure compliance with federal law. ManTech may choose not to apply for a license for such individuals whose access to export-controlled technology or software source code may require authorization and may decline to proceed with an applicant on that basis alone.

ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment because of race, color, sex, religion, age, sexual orientation, gender identity and expression, national origin, marital status, physical or mental disability, status as a Disabled Veteran, Recently Separated Veteran, Active Duty Wartime or Campaign Badge Veteran, Armed Forces Services Medal, or any other characteristic protected by law.

If you require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please contact ManTech's Corporate EEO Department at (703) 218-6000. ManTech is an affirmative action/equal opportunity employer - minorities, females, disabled and protected veterans are urged to apply. ManTech's utilization of any external recruitment or job placement agency is predicated upon its full compliance with our equal opportunity/affirmative action policies. ManTech does not accept resumes from unsolicited recruiting firms. We pay no fees for unsolicited services.

If you are a qualified individual with a disability or a disabled veteran, you have the right to request an accommodation if you are unable or limited in your ability to use or access as a result of your disability. To request an accommodation please click and provide your name and contact information.